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The ultraviolet absorber on Venus - Amorphous sulfurIt is pointed out that the identity of the chemical species responsible for the yellow coloration of the clouds of Venus and for the dark features which dapple the planet at ultraviolet wavelengths has long been a mystery. Independent pieces of evidence, discovered recently, suggest now that amorphous sulfur is the so-called UV absorber. A review of earlier ideas and controversies is presented, and attention is given to a new physical-chemical model of the Venus clouds which shows that sulfur should form there. A description is provided of physical characteristics of the cloud particles that, in comparison with model predictions, indicate the presence of sulfur. Optical data suggesting that elemental sulfur occurs in the clouds is discussed, and cloud morphological evidence for sulfur is considered.
Document ID
19830031348
Document Type
Reprint (Version printed in journal)
Authors
Toon, O. B. (NASA Ames Research Center Moffett Field, CA, United States)
Pollack, J. B. (NASA Ames Research Center Space Science Div., Moffett Field, CA, United States)
Turco, R. P. (R & D Associates Marina del Rey, CA, United States)
Date Acquired
August 11, 2013
Publication Date
August 1, 1982
Subject Category
LUNAR AND PLANETARY EXPLORATION
Distribution Limits
Public
Copyright
Other